Paper box



June 7 1927.

F. J. SCHLEICHER PAPER BOX Filed May 7.

Patented June 7, 1927.

UNITED STATES IRAN! J. BCHLEICHER OI' '1. LOUIS, MISSOURI.

PAPER 301.

Application filed Kay 7, 1986. Serial 110. 107,408.

My invention relates to paper or cardboard box construction and consists in an improved box having curved sides. My invention is particularly) adapted for use in 5 making heart-shaped oxes and I illustrate the application of my invention to such boxes in the accompanying drawings and describe such an application below.

It has been the ractice heretofore to make boxes of this kind by providing a flat sheet for the base, having the desired contour; providing a rectangular strip for the side of the box; placing the latter about a heartshaped form applied to the base sheet and then connecting the base and side sheets by means of a strip of cloth or paper covered with glue, the same being bent to conform to the angle between the side sheet and base sheet. This has always been a manual operation and heretofore, although rectangular boxes have been made ra idly and cheaply by machinery, there has een no cardboard box with curved sides produced which could be turned out by machinery.

The objects of my invention are to produce such a box, to eliminate the necessity of the base and side attaching strip which has heretofore been used and by eliminating this unsightly and unsanitary strip, to avoid an the necessity of providing a cover sheet for the strip and adjacent portions of the box thereby rendering it possible to make a box out of coated cardboard stock which further cheapens the cost of such boxes without detracting from their appearance.

In the accompanying drawings which illustrate a selected embodiment of my invention:

Figure 1 is a top view of my improved box, parts of the same being broken away to more clearly illustrate the structure of the same.

Figure 2 is a vertical section taken on line 2-2 of Figure 1.

Figure 3 is a detail of the rectangular stri from which the box side is formed.

Tlie box base preferably consists of two plain sheets 1 and 2 each having a heartshaped contour, the outer base sheet 2 being somewhat larger than the inner base sheet 1.

The box side 3 is preferably formed from a rectangular stri one edge of which is serrated or notche as indicated in Figure 3 so as to provide a plurality of tongues 4 spaced HEISSUED from each other at their outer ends. These tongues may be bent at right angles to the body of the stri as indicated in Figures 1 and 2 and glue to the underside of the inner base sheet 1, the body of the side forming strip 3 being bent to follow the contour of base sheet 1. Preferably side 3 will be creased along line C before the tongues 4 are bent relative to the body. After side 3 has been assembled with inner base. sheet 1 the outer base sheet 2 maybe a plied to gluing the same to the inner base 8 eet and to the lower faces of tongues 4.

- The distance between the notches forming tongues 4 is varied as indicated in Figures 1 and 3 as the larger curves adjacent the point 5 of the box do not require many tongues to the inch to accommodate the curvature. The sharper curves opposite the point of the box necessitate more notches and tongues to the inch as wide tongues could not be bent satisfactorily at right angles to the body of the sheet.

I have described the box structure but it will be understood that the lid structure will be the same and Figures 1 and 2 illustrate a box and lid assembled with each other. The arts previously referred to being practical y duplicated in the lid and numbered 1, 2, 3", and 4 to correspond to the parts of the box numbered 1, 2, 3, and 4, respectively.

I direct attention to the, fact that if inner base 1 be coated on its upper face and outer base sheet 2 be coated on its outer face, and side strip 3 be coated on both of its faces the box will have an attractive finish without an cover sheetsbeing applied.

Obviously the box side and base may be assembled on a box making machine adapted to assemble rectangular boxes, it only being necessary to modify the cooperating parts of the machine for the heart-shaped contours desired. Of course, curved boxes other than the heart-shaped box illustrated may be made similarly by varying the details of the parts as may be required and I contemplate the exclusive use of such modifications of the details which may be suggested in the commercial development of my invention and as are included in claim.

I claim: A heart-shaped cardboard box comprising the scope of my a base sheet with a heart-shaped contour, tween said notches increasing along the and a side for said box comprising a rectansides of the box adjacent to its point and gular strip notched along one edge with the decreasing along the sharper curves opposite 1. portions between said notches bent inwardly the point.

5 for attachment to said base sheet, the body In testimony whereof I hereunto aflix my of said strip being bent to extend around signatnre this 4th day of May, 1926. the edge of said base sheet, the distances be- FRANK J. SCHLEIQHER. 

